diff --git a/MediaBrowser.Server.Implementations/HttpServer/HttpResultFactory.cs b/MediaBrowser.Server.Implementations/HttpServer/HttpResultFactory.cs
index c55e98388e..04085d3c7e 100644
--- a/MediaBrowser.Server.Implementations/HttpServer/HttpResultFactory.cs
+++ b/MediaBrowser.Server.Implementations/HttpServer/HttpResultFactory.cs
@@ -93,12 +93,14 @@ namespace MediaBrowser.Server.Implementations.HttpServer
                     }
                 }
             }
-
-            if (responseHeaders != null)
+            if (responseHeaders == null)
             {
-                AddResponseHeaders(result, responseHeaders);
+                responseHeaders = new Dictionary<string, string>();
             }
 
+            responseHeaders["Expires"] = "-1";
+            AddResponseHeaders(result, responseHeaders);
+
             return result;
         }